Haldex Automatic Slack Adjuster Spline Arm

The Haldex Automatic Slack Adjuster with spline arm (also called an auto slack adjuster or ASA) is an air brake component for commercial truck and trailer S-cam drum brakes. It connects the brake chamber pushrod to the camshaft. It automatically compensates for lining and drum wear, which keeps brake stroke within the correct range.

Key Features:

• Self-adjusting design that maintains proper brake stroke as the brake linings wear
• Spline arm design that mounts directly to the splined S-cam shaft
• Reduces the need for frequent manual brake adjustments
• Helps provide consistent, balanced braking performance
• Built by Haldex, a long-established supplier of air brake and commercial vehicle braking components

Automatic slack adjusters help keep air brake systems in adjustment, which supports braking efficiency and reduces maintenance time. Choose the correct variant for your brake application, and follow the manufacturer's installation and adjustment procedures.